Where is the primary static system located?

The primary static system in an aircraft is essential for providing critical information regarding the aircraft's altitude, vertical speed, and airspeed. This system typically consists of a series of static ports, which are strategically placed to minimize the impact of disturbances caused by the aircraft's airflow.

The correct answer identifies the primary static system as being located in the upper right and lower left sections of the cockpit. This placement is beneficial because it allows for one set of static ports to be positioned where airflow is less disturbed, which is crucial for accuracy in readings. The upper right static port can effectively measure atmospheric pressure without interference from other airflow issues, and the lower left complements this by allowing redundancy and additional measurement from another position.

This configuration enables the pilot to have reliable access to static pressure data, which is vital for the operation of altimeters and vertical speed indicators. Proper placement helps ensure that the readings from the static system are accurate and consistent, thus providing essential information for safe flight.

Though other configurations present in the options may seem plausible, they do not provide the same level of reliability or redundancy that the upper right and lower left locations offer, which is why this answer is considered the most accurate.